<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script>
var arr = ["a", "b", "c"];
var arr1 = arr.concat(["aa", "bb"], ["cc", "dd", "ee"], "abc");
console.log(arr1);
console.log(arr);
</script>
</body>
</html>